Carbon dioxide indicating apparatus



FIG. 1 is a side view of carbon dioxide indicating apparatus showing mynew design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a left end view thereof;

FIG. 5 is a right end view thereof;

FIG. 6 is a first perspective view thereof taken from the right end asviewed in FIG. 1; and,

FIG. 7 is a perspective view thereof taken from the left end as viewedin FIG. 1.

The ornamental design for the carbon dioxide indicating apparatus, asshown and described.